Doffing mechanism for spinning machines



1951 K. w. CROSSMAN ET AL 2,541,503

DOFFING MECHANISM FOR SPINNING MACHINES Filed Jan. 18, 1949 10 Sheets-Sheet 1 &

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Feb. 13, 1951 K. W. CROSSMAN ETAL 2,541,503

DOFFING MECHANISM FOR SPINNING MACHINES l0 Sheets-Sheet 10 Filed Jan. 18, 1949 INVENTORS.

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wN MQE Patented Feb. 13 1951 DOITFING IVIECHANISM FOB SPINNING MACHINES Kenneth W. Crossman, Abington, and Jack Numerof, Philadelphia, Pa., assignors to The Edwin H. Fitler Company, Philadelphia, Pa., a corporation of Pennsylvania Application January 18, 1949, Serial No. 11,488

8 Claims. (Cl. 57-52) This invention relates to spinning machines, roving frames and twisters. More specifically, it is concerned with spinning machines designed for the production of relatively coarse yarns or cords such, for example, as are intended to be subsequently incorporated into ropes, hawsers, etc. Spinning or twisting machines of the type particularly referred vto are ordinarily equipped with manually operable dofling mechanisms whereby, upon stoppage of the machines after each spinning operation, trays supporting multiple filled spools or bobbins are removed from the traverses and ejected from the machines, and substitute trays with empty spools are at the same time transferred to and positioned upon the traverses in preparation for a succeeding spinning operation. These spool trays are of considerable weight, and therefore a great amount of manual effort is required to operate the doifing mechanisms in effecting the interchange of the trays. Accordingly, with machines of the above type, as ordinarily constructed, it is necessary to employ robust attendants. The dofiing so accomplished manually is at best slow and, moreover compels relatively long idle periods of the machines with consequent reduc-' tion in their output.

The chief aim of the present invention is to overcome the foregoing drawbacks, which objective is realized in practice, as hereinafter more fully set forth, throug'h provision of power means by which the dofling mechanisms of the machines are automatically operated to carry out the dofflng cycles quickly and efficiently and without expenditure of any exertion whatever on the part of the machine attendants.

Other objects and attendant advantages will appear from the following detailed description of the attached drawings, wherein Fig. l is a broken out view, in front elevation, of a spinning or twisting machine conveniently embodying the invention.

Fig. 2 is a view of the machine in end elevation as seen from the right of Fig. l, with portions broken out for exposure of important parts which would otherwise be hidden.

Fig. 3 is a fragmentary view in cross section taken as indicated by the angled arrows III-III in Fig. 1.

Fig. 4 is a broken out fragmentary view in horizontal section taken as indicated by the angled arrows IV-IV in Fig. 3.

Figs. 5 and 6 are fragmentary detail sections taken as indicated by the angled arrows V-V and VIVI in Figs. 3 and 2 respectively.

Fig. 7 is a fragmentary detail section taken as indicated by the angled arrows VII-VII in Fig. 2.

Fig. 8 is a fragmentary section taken-as indicated by the angled arrows VIII-VIII in Fig. 7.

Fig. 9 is a. circuit diagram showing various electric appurtenances by which the machine is driven and the dofiing automatically carried out under power according to the invention.

Figs. 10-14 are views like Fig. 9 showing successive stages in the control of a dofling cycle.

In the illustrated spinning or twisting ma chine, the textile fiber slivers indicated at R are drawn forwardly from suitable individual sources of supply (not shown) at the rear of the machine and then across the top thereof by rollers i0 and ii to arcuate smoothing guides I 2. By these guides the slivers are directed downwardly of the front of the machine into the axial bores of the upwardly extending spindles l3 of a group of staggeringly arranged fliers H. The flier spindles l3 are rotatively borne in a beam I5 which extends longitudinally of the front of the machine at the top between its side frames l6 and I1, and secured to the upper protruding ends of said spindles are sheaves I8, see Fig. 3. Through the medium of a rope belt 19 trained about the sheaves IS, an idler pulley 20 and a drive pulley 2| which latter is mounted on a longitudinal extending shaft 22, the required rotary movement is imparted to the fliers H to twist the slivers into yarns and to concurrently wind the yarns upon individual bobbins or spool-3 indicated at S. As shown, the spools S are impaled upon studs 23 which are centered to correspond with the staggered arrangement of the flier axes, on a tray 24 supported at its opposite ends upon inwardly directed lateral ledges 25 on the forwardly extending arms 26 of a pair of angular brackets 21 which together constitute the traverse of the machine. The upright arms 28 of the brackets 21 are provided with rollers 29 which engage vertical guide ways 30 in supplementary transverse frames 3| and 32. The mechanism for actuating the traverse in spinning includes spur wheels 33 which are affixed to another longitudinal shaft 34 and which mesh with rack teeth on the upright arms 28 of the brackets 21. Meshing in turn with the spur wheels 33 are similar toothed wheels 35 on a parallel shaft 36 which extends out through a bearing on the side frame H, see Fig. 4, and also through a gear housing 31 attached to said frame. Within the housing 31 is an auxiliary mechanism for actuating the traverse during a,su,sos

dofling. This auxiliary mechanism includes an internal gear wheel 30 and a spur wheel 25 positioned alongside each other on the shaft 35, the former of said wheels being freely mounted and the latter fixed on said shaft. During the normal operation of the machine, the internal gear wheel 38 is connected to the spur wheel 52 by means of a clutch bolt 40, see Fig. 6, which is axially slidable in a boss its on the last mentioned gear. At its outer end. the clutch bolt 40 has a grasp handle 4I whereby it can be retracted against the action of a compression spring 42 to free the internal gear wheel 35, and at the same time be locked out by turning it through right angles to position a cross pin 43 which normally occupies diametrical notches in the boss 38a, over the end of said boss. Withdrawal of the clutch bolt 40 as lust explained is attended by the automatic closing of a springiniluenced electric safety switch 44 which will be again referred to later. Also within the housing 51 is a transfer carriage actuating mechanism which comprises a gear train with spur wheels 45, 45 and 41 (Fig. 2) whereby rotary motion is transmitted from the spur wheel 55 on shaft 36 to a shaft 48 which will be again referred to hereinafter.

Meshing with the internal gear wheel 38 is a spur pinion 50 at the outer end of two part shaft whereof the sections 5I and 52 are connected by a universal coupling 53. As shown, the section 5I passes through a bearing on the side frame II while the distal end of the section 52 passes through the upward arm of a counter weighted oscillating member 54 (Fig. 3) and carries a spur pinion 55. The oscillating member 54 is secured to a horizontal rock shaft 55 together with an arm 51 arranged to be alternatively engaged by pins 58 and 59 vertically spaced on the upright arm 28 of one of the traverse brackets 21. As the shaft 56 is rocked, the spur pinion 55 is alternately brought into engagement with spur pinions 5. and BI respectively on oppositely rotating shafts 52 and 63 which are caused to revolve in unison through intermeshing spur wheels 55 and 56 respeetively on them. For a reason which will later be made apparent, the pin 58 is axially free in a guide hole in the upright arm 25 of the traverse bracket 21 and subject to a compression spring 61 (see Fig. 5) whereby its inner end is maintained in engagement with a cam surface 68 on the auxiliary transverse frame 5|. Connected at one end to the horizontalarms 25 of the traverse brackets 21 are chains as which pass over guide sprockets I and II to the rear of the machine for suspension of counterbalance weights such as shown at I2 in Fig. 2 from their opposite ends. The mechanism just described constitutes themeans by which the traverse is reciprocated vertically relative to the flyers during the spinning.

The machine is powered by a single phase A. C. electric motor indicated at I in Fig. 1 through a pulley belt connection with a main drive shaft I1 which extends into a housing I8 attached to the side frame I5. Within the housing It is a suitable transmission mechanism (not shown) from which the draw rollers III and II, the shaft 22 for the rope pulley 2I of the flier drive, and the shaft 36 for the traverse actuating mechanism all derive their motion. The doiling means is located at the bottom of the machine beneath the fliers I4, and as shown, comprises a pair of transversely spaced longitudinal shafts III! and BI, and transfer carriage bars 22 for a supplemental or substitute spool tray 24:. The bars 82 are arcuate in configuration and slotted as at II, for uidance to longitudinal movement, by rollers 54 and 25 free on the shafts 25 and II. The carriage bars I2 are spaced to support the tray 24: from beneath adjacent opposite ends, and are relied upon to carry said tray from the fully retracted or domng position of Figs. 2 and 3 to the dot-dash line inward position of Fig. 3 beyond the path of the traverse. Such movements are induced in the transfer carriage bars 82 by actuating mechanism including spur pinions as and 81 on the shafts Ill and ll which pinions are adapted to successively engage with gear racks 85 at the bottom of the tray 24:. The shafts II and II are rotated inunison and inthe same direction by gearing in the lower part of the housing 51. As shown, this gearing includes similar spur wheels I! and 5. respectively on the shafts 50 and II which mesh with an interposed spur wheel 9|. From Fig. 2 it will be observed that the spur wheel II is rotated through a train of spur wheels 22, 52, 54, 55, and 85 from a shaft 91 which, in the machine as originally designed, is intended to be turned manually by application of a hand crank thereto. It is to be understood that the machine may have several multiple spool sections such as described and of which only one is illustrated in Fig. 1 of the drawings.

The means devised for carrying out dofnng automatically under power in a machine such as above described in accordance with the present invention, includes a reversible auxiliary electric motor IIII (Fig. 2) which is mounted on the rear part of the end frame I1. Connected to the shaft IIII of motor IOII by a universal coupling I52 is a shaft Ill whereof the distal end is supported in a floating bearing I54 (see Figs. 7 and 8) pivotally connected to the ends of an arm I05 fixed on a shaft Ill. As shown, the shaft I" is rotatively supported in a bearing bracket I51 within the housing 21, and to its outer protruding end is aiiixed a hand lever Ill. The shaft Ill carries a worm I which is normally out with engagement with a worm wheel III on the shaft 48 as shown in Fig. 2. Also affixed to the shaft I" is a cam III whereof the edge is engaged by a roller crank arm I I2 of a normally open electric safety switch III. with this arrangement it will be seen that as the hand lever III! is turned through a half rotation. the shaft I52 will be moved downward and the worm Ill engaged with the worm wheel IIO, with concurrent closing of the switch III to start the motor Ilil for actuation of the secondary actuating mechanism by which the traverse is lowered and raised during the dofling as later on explained.

For the purpose of driving the transfer earriage actuating mechanism incident to the dofllng there is provided a separate reversible auxiliary A. C. electric motor II5 which, see Fig. 2, is supported on a fixed bracket II5 and has a small pulley III connected by a belt II8 to a larger pulley II! on a shaft I20. Amxed to the shaft I20 within the housing 31 is a spur wheel III which meshes with a mating spur wheel I22 on shaft 91. Supply of current to the motor II5 is automatically controlled in. a manner presently explained by reversing limit switches I23 and I24 whereof the actuating levers I25 and I25 extend into the path of a lug projection I21 on the supplemental spool tray 24:. The main driving motor 15 of the machine is started and stopped by means of a push button switch I25 mounted at the front of the side frame It, see Figs. 1 and 6 2. At the front of the other side frame I1 of the machine is a push button switch I 29 for controlling current supply to the auxiliary motor I during the dofllng cycle. For the control of certain circuits presently described there is shown another pair of reversing limit switches I30 and I3I (Fig. 2) which are aflixed to the framework of the machine with their actuating arms I32 and I33 in the path of a lug I34 on one of the traverse counter weight chains 69. Other electrical appurtenances employed in addition to the electrical elements thus far described are shown in diagrammatic Fig. 9. This additional equipment includes relays I35, I36, I31, I38 and I39 which in practice are enclosed in a protective box indicated by the dotted lines at I40. The relay I35 is of the double contact type, and the relays I36-I39 respectively are of the triple contact type. The main driving motor 15 is operated by current from a single phase A. C. line of which the mains are designated I42 and I43, and the auxil-' iary motors I00 and I I5 from a three phase power line whereof the mains are designated I44, I45 and I46. Fig. 9 shows the condition of the electrical system during the normal operation of the machine in spinning when current is supplied to the main or driving motor 15 from the single phase mains I42 and I43 by way of conductor I50, armature I35a of relay I35, conductor I5I, closed push button switch I28, and conductors I52 and I53. At this time the auxiliary motors H0 and H5 are idle and the relays I36I39 are all open. After the desired amount of yarn has been wound upon the spools S on tray 24, the machine attendant opens the switch I28 by pushing the stop button thereof when said tray is in its lowest normal position as in Fig. 3 to cut the supply of current to the drive motor 15 whereupon the machine comes to rest.

Preparatory to dofllng, the machine attendant is required to throw the hand lever I08 for lowering of the worm I09 on shaft I03 (Fig. 2) into meshing engagement with the worm wheel IIO on shaft 48, and to withdraw and lockout the latch bolt 40 for unclutching of the spur gear 39 (Figs. 2 and 6) from the internal gear 38 and so prevent subsequent operation of the mechanism by which the traverse is normally actuated in the spinning.

Closing of the safety switches 44 and H3 by the above preparatory steps results in the operation of the relay I35 as will be seen from Fig. 10 to open the circuit to the main drive motor so that the machine cannot be set into motion now by closing the push button switch I28. The closing of relay I35 as just explained is due to current flow in its solenoid coil from the power mains I42, I43, by way of conductor I56, closed safety switch II3, conductor I51, closed safety switch 44 and conductor I58. At the same time, the relay I36 is actuated as a consequence of current flow in its solenoid coil from the power mains I42 and I43 by way of another circuit including the armature I35a of relay I35, conductors I60, I6I, limit switch I3I, conductor I62, limit switch I24, and conductors I63, I 64, I65. As the relay I36 closes, current flows from the three phase mains I44, I45 and I46 to the motor I00 by way of conductors I66, I61 and I68. The shaft I03 is thereby rotated and, through its worm I09, drives the worm wheel I I0 from which the motion is transmitted, through the gear train 41, 46, 45 and 39 to the shaft 36 and in turn from the latter to the auxiliary traverse actuating gearing,(Fig. 4) to elevate the spool tray 24. As the tray 24 6 rises, the lug I34 on the balance weight chain (Fig. 10) will eventually engage the lever of reversing limit switch I3I and throw said switch to the dotted line position in Fig. 10. This occurs when the tray 24 has been raised to its highest position in the machine when current flow to the coil of relay I36 is interrupted so that the latter will open and cut the supply of current to the auxiliary motor I00. The entire electrical system thus becomes dormant at this stage, and, in order to proceed with the dofling, the machine attendant is required to push the start button of the push button switch I29 as in Fig. 11. By this step, the relay I39 is closed as a consequence of current flow established from the main I42 through conductor I10, switch I29, conductor I1I, reversing limit switch 1 3I, conductor I12, reversing limit switch I23, conductor I13 coil of relay I39, conductor I14, and relay switch I35 to main I43. As a result current is supplied to the transfer motor II5,from the three phase mains I44, I45 and I46 through the closed contacts of relay I39 and the conductors I16, I11 and I88. Upon being-set in motion, the motor H5 (Fig. 2), by driving the auxiliary actuating mechanism constituted by the gear train I2I, I22, 96, 95, 94, 93, 92, SI 89 and 90 causes rotation of the shafts 80 and 8| so that the spur pinions 86 and 81 on the latter successively act upon the rack .88 on the supplemental empty spool tray 24:: which is accordingly moved inward, together with the transfer carriage slides 82 to the position shown in broken lines in Fig. 3 beyond the path of the traverse. As the tray 24:: completes its inward travel, it throws the reversing limit switch I24 to the position shown in Fig. 12 whereupon the relay I31 is closed and current flow established to the traverse motor I00 which now runs in the opposite direction to effect lowering of the filled spool tray 24. The operating current flow to the relay I31 under this condition is from the main I42 conductors I65, I64, reversing limit switch'l23, conductor I80, limit switch I30 conductor I8I, coil of relay I31, conductor I14 and contact I35a of relay I35, to the main I43; while the current flow to the traverse motor I00 is from the three phase mains I44, I45 and I46 by way of conductors I83, I84 and I85 and the connecting conductors I66, I61 and I68. Under the drive of the traverse gear mechanism, the traverse brackets 21 are moved downward until the spool tray 24 is deposited upon the transfer bars 82, when the lug I34 in the counterweight chain 69 will throw the reversing limit switch I30 as in Fig. 13, whereupon the relay I38 will be closed and current flow established to the transfer motor I I5 which this time will be driven in the reverse direction. The movement imparted to the traverse at this time is in excess of its normal downward travel during the spinning. In order to permit this, the stud, 58 (Fig. 5), which ordinarily cooperates with the oscillating member 51, recedes into the deep portion of the cam way 68 on the supplemental transverse frame 3I. The current flow to the relay I38 will be from the main I42 through conductors I10 andl86, reversing limit switch I30, conductor I81, reversing limit switch I24, conductor I 88, coil of relay I38, conductor I14, contact I35a of relay I35, and conductor I89 to main I43; while the motor II5 will be supplied with current from the mains I44, I45 and I46 through conductors I90, I8I and I92 which latter connect respectively with conductors I16, I11 and I18. With the auxiliary motor II5 now running to drive the transfer actuating gear mechanism, the transfer slides 02 will be moved outward carrying with them the filled spool tray 24 and the substitute empty spool tray 24:, whereby the former will be moved to unloading position and the latter to position under the flyers I4. Upon completion of this movement, the reversing limit switches I 23 and I24 will be re-set in their original positionswith consequent automatic stoppage of the auxiliary motor H5 and placement of the system in the condition in which it is shown in Fig. 14, when the auxiliary motor I00 will be automatically restarted through closing of relay I36 in the same manner as described in connection with Fig. to raise the traverse for elevation of the tray 24.1: with the empty spools into operative position relative to the flyers I4. As the traverse begins its ascent, the machine attendant is required to turn the clutch pin 40 (Fig. 6) by means of the grasp 4I, back to its original position. Upon full elevation of the traverse, the clutch pin 40 will be automatically thrust inward by its spring 42 to re-engage the hole in the internal gear 30 in readiness for the gear mechanism in Fig. 3 to take over and operate the traverse during the next spinning cycle. The auxiliary motor I00 is automatically stopped by opening of the switch 44 as re-clutching by the pin 40 takes place, whereupon the entire electrical control system is rendered dormant as in Fig. 9. At this stage, the machine attendant opens the switch ill by turning up the handle I08, with incidental withdrawal of the worm I09 on shaft I03 from engagement with the worm wheel IIO as in Fig. 2. The yarns or twines at the filled spools on the ejected tray 24 are then severed, and the out ends leading from the smoothing guides I2 attached to the empty spools on the fresh tray 14, and the main motor I5 finally re-started by pressing the "start" button of manual switch I20 to initiate another spinning cycle. As the new spinning cycle proceeds, the filled spools are removed from ejected tray 24 and replaced by empty ones in preparation for the next dofilng cycle.

In addition to the function already described. the switches 44 and H3 serve as safety means when open as shown in Fig. 9 and is normally the case to prevent starting of a dofiing cycle while the main motor is running to drive the machine with the result that the various mechanisms of the organization are protected against injury and/or derangement.

Having thus described our invention, we claim:

1. In a spinning machine or the like, a main power drive means; a horizontally-arranged group of flyers rotative about individual vertical axes; a vertically-reciprocatory traverse for supporting a tray with upright spools in axial alignment with the respective flyers, transfer means with a carriage and mechanism for moving the carriage for dofilng purposes crosswise of the machine beneath the traverse; primary mechanism for normally reciprocating the traverse relative to the flyers during the spinning, secondary actuating mechanism for lowering and raising the traverse during dofiing, and instrumentalities for carrying out a dofiing cycle upon stopping of the machine at the completion of each spinning operation including separate 'reversible power drive means for respectively actuating the auxiliary traverse operating mechanism and the transfer carriage operating mechanism, manual means for starting the transfer carriage drive means for transfer of a supplemental tray with empty spools inward of the machine beyond the path of the traverse, means automatically operated by the transfer carriage as it reaches the end of its inward travel to stop the transfer carriage drive means and to start the traverse drive means for lowering the traverse and deposit of the filled tray into the transfer carriage, means automatically operated by the carriage upon deposit of the filled tray to stop the traverse drive means and to start the transfer carriage drive means for outward movement of the carriage to discharge the filled tray and to concurrently position the supplemental tray beneath the flyers, means automatically operated by the carriage drive means to then stop the carriage drive means and start the traverse drive means for raising the traverse and the supplemental tray thereon to spinning position relative to the flyers, and means automatically operated by the traverse when it has been so raised to stop the traverse drive means.

2. A spinning machine or the like according to claim 1, further including safety means to prevent starting of the machine during dofling cycles, and to prevent operation of the dofling means during spinning cycles.

3. A spinning machine or the like according to claim 1, further including manual means for connecting the secondary traverse actuating mechanism to its drive means after stopping the machine at the completion of a spinning cycle, and means operated by said manual means to prevent operation of the main drive means during dofiing cycles.

4. A spinning machine or the like according to claim 1, further including manual means for disconnecting the primary H traverse actuating mechanism from the main drive means upon stopping of the machine upon completion of a spinning cycle, and means operated by said manual means to prevent operation of the main drive means during dofllng cycles.

5. In a spinning machine or the like, a mainelectric drive motor, manual switch means for starting and stopping the main motor, a horizontally-arranged group of flyers rotative about individual vertical axes, a vertically-reciprocatory traverse for supporting a tray with upright spools in axial alignment with the respective flyers, transfer means with a carriage and mechanism for moving the carriage for transfer purposes crosswise of the machine beneath the traverse, primary means for normally reciprocating the traverse relative to the flyers during the spinning, secondary actuating mechanism for lowering and raising the traverse during dofiing, and means for carrying out a dofllng cycle upon stopping of the machine at the completion of each spinning operation, including separate reversible electric motors for respectively actuating the secondary traverse actuating mechanism and the transfer actuating mechanism, manual switch means for starting the transfer carriage motor for transfer of a supplemental tray with empty spools inward of the machine beyond the path of the traverse, switch means automatically operated by the transfer carriage as it reaches the end of its inward travel to stop the transfer carriage motor and to start the traverse motor for lowering the traverse and deposit of the filled tray upon the transfer carriage, switch means automatically operated upon deposit of the filled tray to stop the traverse motor and to start the transfer carriage motor for outward movement of the carriage to discharge the filled tray and to position the supplemental tray beneath the flyers, other switch means automatically operated by the transfer carriage to stop the transfer carriage motor and start the traverse motor for raising the traverse and elevating the supplemental tray to spinning position relative to the flyers, and still other switch means automatically operated by the traverse when the latter has been so raised to stop the traverse motor.

6. A spinning machine or the like according to claim 5, further including saiety means to prevent starting of the machine during dofling cycles, and to prevent operation of the dofllng -means during spinning cycles.

7. A spinning machine or the like according to claim 5, further including manual means for mechanically connecting the secondary traverse actuating mechanism from the traverse motor after stopping of the machine at the completion of a spinning cycle, and a normally closed switch opened by operation of said manual means to prevent current supply to the main motor during domng cycles.

8. A spinning machine or the like according to claim 5, further including manual means for mechanically disconnecting the primary traverse actuating mechanism upon stopping of the machine after completion of a spinning cycle, and a normally-closed switch opened by operation of said manual means to prevent current supply to the main motor during dofiing cycles.

KENNETH W. CROSSMAN.

JACK NUMEROF.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,543,618 Prince-Smith et al. June 23, 1925 1,695,659 Mackie Dec. 18, 1928 1,823,374 Porter Sept. 15, 1931 2,076,423 Anderson Apr. 6, 1937 FOREIGN PATENTS Number Country Date 485,303 Germany Oct. 29, 1929 

